If you're not gonna be like "freebitco.in" or "satoshicity.org" or "alienfaucet" or "moonbitco.in" etc
Then you're not gonna make much. And those faucets are paying 3 BTC+ everyweek. Do you have enough funds to do it?
You would have to fund it yourself and most likely lose money at first. Getting advertising, and profit is not going to be easy.
Those who have done it and are making big profits likely will not be sharing their secrets, or what works best.
It's not much a secret; If you've followed those websites you can see what they did.
Start with an unadvertised website; Make people coming with ref spam. Probably you'll give away 0.1-0.2 BTC on the first day, make those payments. And give the ref spammers proof to atract more to come.
Then start to add ads on website slowly.
Rule: never use popup, pop under ads etc.
Rule 2: ads shouldn't bother people and it should be easily claimed.
Of course you need a good name & high budget to atract more people and make the faucet a brand.
You'll lose money on the first week (~1-3 BTC) but you can easily earn more even x2 or x3 what you gave...